TOP PHOTOS: More than 30,000 protesting against Colombia's President Juan Manuel Santos, Heavy flooding leads to evacuations in Russia and the Philippines

Protesters walk past a traffic sign defaced with a message that reads in Spanish; "Santos Down" referring to Colombia's President Juan Manuel Santos, in Ventaquemada, Colombia, Thursday, Aug. 22, 2013. Farmers and truckers are blockading Colombian highways for a fourth day. The more than 30,000 protesters have an assortment of demands: Truckers want cheaper gasoline. Potato and onion growers are demanding lower prices for fertilizer. Coffee farmers want a government subsidy extended. The protests do not affect vital industries. But they are a major challenge for Santos. (AP Photo/Fernando Vergara)